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United States Patent | 6,079,442 |
Raymond, Jr. ,   et al. | June 27, 2000 |
There is disclosed an actuator for a rotary valve, such as a butterfly valve which rotates a quarter of a turn between open and closed positions. The actuator includes a drive mechanism releasably attachable to the stem of the valve for rotating it in response to operation of a reversible electric motor.
Inventors: | Raymond, Jr.; Frank Jo (Houston, TX); Bertoja; Michael John (Houston, TX); Johnston; Francis William (Houston, TX); Gent; David Wayne (Houston, TX) |
Assignee: | Bray International, Inc. (Houston, TX) |
Appl. No.: | 938339 |
Filed: | September 26, 1997 |
Current U.S. Class: | 137/554; 74/412TA; 74/421A; 74/423; 74/425; 74/625; 251/129.03; 251/129.12; 251/248; 251/249.5 |
Intern'l Class: | F16K 031/05; F16K 031/53 |
Field of Search: | 74/412 TA,420,421 A,423,425,625 251/129 B,129.11,129.12,129.13,248,249.5 137/553,554,556 |
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5305781 | Apr., 1994 | Raymond, Jr. et al. | 137/554. |
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Brochure entitled "L120 Series Electric Valve Actuators", Limitorque, Bulletin 120-10000, Issue Sep. 1990. Brochure entitled "Series 2000 Electric Actuator: Quarter Turn", EIM Controls, E-791, pp. 1-9. Brochure entitled "Rotork `A` Range Double Sealed 3-Phase Electric Valve Actuators", Rotork Actuation, Publication E21OE Issue Feb. 1993, pp. 3-15. Brochure entitled "Actuators, Auma Norm, SA 07.1--SA 48.1" Auma Benelux B.V. Brochure entitled "Keystone F777 Electric Actuator", Keystone The Flow Control Company. British Search Report for U.K. Application GB 9828220.5 dated Apr. 29, 1999. British Search Report for U.K. Application GB 9901048.0 dated Apr. 30, 1999 . |